Mr Peterson (David Tennant) is an anxious supply teacher who takes a job at an underachieving primary school, St Bernadette's. He struggles to care for both his uninspired pupils, and his heavily pregnant wife (Joanna Page). He lives in the shadow of his overachieving 'golden boy' identical twin brother (also played by David Tennant), who is a teacher at a posh private school, ... (展開全部)